Rocca della Verruca: A Pisan Fortress on Monte Pisano
Site at a Glance
- Rating
- 4.7
- Popularity
- Low
- Country
- Italy
- Primary era
- Medieval
- Eras represented
- Medieval, Early Modern
- Civilizations
- Republic of Florence, Republic of Pisa
- Site type
- Military
- Remains
- Fort
On this page16 sections
History
Rocca della Verruca is an ancient fortress in Italy, built by the medieval Republic of Pisa on Monte Pisano in the thirteenth century. It occupied a rocky position above the Pisan plain and the Arno valley, forming the centre of a wider defensive network that included Caprona, Vicopisano, Buti, and other mountain fortifications.
Early fortification and the wars with Florence
A fortification already occupied the site in 780, but the present fortress belongs to the thirteenth century. It remained an active military structure until the definitive fall of Pisa in 1503. During the repeated wars between Pisa and Florence, the stronghold was the scene of violent fighting and repeatedly continued to serve as a Pisan base after Pisa itself had fallen to its enemy.
The fortress formed part of a system for transmitting military warnings. Sheets, banners, smoke, fires, and artillery shots conveyed coded signals between the stronghold, Pisa, and nearby outposts, allowing reports of approaching troops to travel quickly. When visibility was poor, messages were relayed through mountain positions such as Torre dello Spuntone, the fortification of Asciano, and the castles of Agnano and San Giuliano.
Renaissance alterations and abandonment
The four corner towers were among the final additions made before the last decisive conflict with Florence. The two towers on the eastern side were larger than the two on the west, and all contained loopholes and openings for crossbows. In 1509, the fortress underwent renovation. The two polygonal bastions, projecting fortifications designed to provide defensive fire along adjoining walls, are attributed to Antonio da Sangallo, an Italian Renaissance architect and military engineer. The large cylindrical tower at one corner of the perimeter is attributed to Luca del Caprina of the Francione workshop.
Rocca della Verruca was later abandoned after it ceased to stand on a frontier and lost its defensive purpose. An inscription found beneath the stringcourse of the western bastion is now preserved at the Museo di San Matteo in Pisa. Its wording, “A DÍ DODICI DI G(I)UGNO MCIII,” has been regarded as one of the earliest documents in Italian vernacular. The position of the inscription on the fortress walls may nevertheless date from much later than the year written in its text.
Modern interventions and traditions
In the early twentieth century, a project began to erect a monumental cross in response to Pope Leo XIII’s initiative to place the Christian symbol on Italy’s highest summits. Archbishop Maffi of Pisa laid the first stone in 1904, but the Superintendency for Cultural Heritage halted the work to preserve the appearance of the ancient fortress.
On 8 September 2009, an arson fire burned approximately 120 hectares of forest on the northwestern slope of the mountain. Calci municipality and the Province of Pisa chose not to reforest the area, partly because of limited regional funding, and Mediterranean vegetation of small shrubs developed in place of the former holm-oak and oak woodland. A severe fire in September 2018 devastated the southeastern part of Monte Pisano and also affected the fortress, destroying almost all the vegetation then present.
Since November 2009, the Compagnia di Calci, an association founded in 2004 to protect the territory and environment of the Valgraziosa, has held the part of the fortress within Calci on loan from its owner, Costantino Conforti. Volunteers have continued cleaning and safety work to counter abandonment and expose areas hidden by vegetation. Before and between the fires, holm oaks, ivy, brambles, and other shrubs covered parts of the ruins, while their roots threatened the stability of the wall foundations.
A longstanding tradition claims that an underground passage linked the fortress with Pisa. The claim is considered false because no historical evidence supports it, and excavation through Verrucano rock beneath the rivers of the plain for more than ten kilometres would not have been technically plausible with sixteenth-century technology. The fortress has also been thought to have served Leonardo da Vinci as a viewpoint for his bird’s-eye drawings, although this remains a supposition.
Remains
The fortress occupies the entire summit of Monte Verruca, which rises 537 metres above sea level. Built from stone and brick on a rocky spur, it has a pentagonal plan, with the two eastern sides often treated as a single strongly convex side. Its foundations and bastions are anchored directly to the rock and remain structurally firm, while much of the superstructure has collapsed. Soil and grass cover much of the interior, which still follows a characteristic slope toward the east.
Layout and principal structures
Entrance and parade ground
The only entrance is on the eastern side, reached by a short, steep stairway cut into the rock. The entrance is damaged. Beyond it lies the parade ground, whose centre contains the remains of the fortress church. Several openings in the ground lead down by steps to underground rooms, while other square openings occupy the centres of those rooms’ ceilings.
Central church
The central church has a rectangular plan and massive walls made from large blocks of Verrucano stone, a resistant local metamorphic rock used widely as a building material in Tuscany. Two doorways open through its long sides, and two splayed windows are set in the right-hand wall. The lower courses, reaching about two metres, use large blocks, while smaller stones in the upper courses probably came from the Buca delle Fate quarry, which also supplied the nearby church of the monastery of San Michele Arcangelo. The roof and floor have disappeared, and the floor may have been little more than a grass-covered surface.
Keep and southern curtain wall
Large boulders behind the church once supported the keep, the fortress’s principal tower. Only one wall survives, and it probably continued as far as the southern wall. The tower formerly stood at the highest point of both the fortress and the mountain. It was probably dismantled after gunpowder became established in warfare, both to prevent it from becoming an easy target and to reduce the danger of collapse during a siege.
The southern curtain wall is the highest part of the perimeter because of the interior slope. Several stone corbels remain on its inner face, where they supported the internal walkways.
Corner towers and artillery defenses
Southeastern tower
The southeastern tower contains two mine galleries, covered passages or chambers used for defensive operations, reached by a stone stairway. Their gun ports, openings through which artillery could be fired, covered the southern wall and the eastern wall containing the entrance.
Southwestern bastion
The southwestern corner has a slightly projecting earthwork or rampart. Its bastion contains a west-facing mine gallery that remains unrepaired and lacks the stone frame removed in the 1970s. Another gun port near the bastion provided additional coverage of the southern wall.
Northwestern bastion
The northwestern corner is formed by a pointed polygonal bastion. A large interior room with vaulted spaces lies beneath piles of debris. It may have contained an entrance to a concealed passage leading outside the fortress as a service or emergency exit, a feature that possibly helped generate the later story of a tunnel to Pisa.
Northeastern tower
The well-preserved northeastern tower is reached by a stone staircase. Its large interior room contains two gun ports directed toward the northern and eastern walls. A narrow passage branching from the same stairway ends at another gun port halfway along the eastern wall.
Northern defenses and cistern
The remaining fortified angles include round towers at the north and northeast, together with the pointed northwestern bastion and the southwestern earthwork. Among the vegetation is the opening of a large quadrangular cistern with a barrel vault. Filled with debris, it probably collected rainwater.
Mountain setting and surviving fabric
From the summit, the landscape extends across the Pisan plain toward the Metalliferous Hills to the south, almost to San Miniato in the southeast, and westward to the sea. In favourable weather, the Tuscan Archipelago is also visible. The exposed rock of the spur is called Verrucano stone. Although the same stone occurs throughout Monte Pisano, it supplied numerous buildings in Pisa and Livorno, and the name is also applied to comparable formations in other mountain ranges, including the Apuan Alps.
The 2009 and 2018 fires changed the vegetation around the fortress. The loss of covering growth has affected how the ruins are exposed, while earlier roots from trees, ivy, brambles, and shrubs had seriously threatened the stability of the foundations. Several underground rooms and the central chapel remain comparatively intact amid the collapsed superstructures.
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